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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
    <script>
        let obj = Object.defineProperty({},"name",{
            configurable:true , 
            enumerable:true ,
            get(){
                console.log("get");
                return "张三" ; 
            } ,
            set(value){
                console.log("set");
                console.log(value);
            }
        });
        console.log(obj.name);
        obj.name = "李四" ; 
    </script>
</body>
</html>